cgroup: Add missing cpusreadlock() to cgroupattachtask_all()
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.10.145 by commit 9f267393b036f1470fb12fb892d59e7ff8aeb58d, it was introduced in version v5.10.143 by commit dee1e2b18cf5426eed985512ccc6636ec69dbdd6. For more details please see the references link.